Artinite

Formula : Mg2(OH)2(CO3):3H2O

Space group: 
Monoclinic Space Group: C 2 or C 2/m
Dana class: 
16b.3.1.1 (16b) Carbonates - Hydroxyl or Halogen (16b.3) where Am Bn (XO3)p Zq . x(H2O), (m+n):p = 2:1(16b.3.1)Dana Group
High temperature: 
Low temperature mineral also possible in weathered environments.
Geological context: 
It is always associated with ultra-basic igneous and metamorphic rocks such as serpentinite.

Dernière mise à jour le 11.06.2018

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
cm3·mol-1
ΔGºf
J·mol-1
ΔHºf
J·mol-1
J·mol-1·k-1
CP
J·mol-1·K-1
196.679 96.900 -2568352 -2920612 232.923 296.05
Reaction properties

Artinite + 3H+ ⇌ HCO3- + 2Mg+2 + 5H2O

298.15 K, 1 bar log10K: 20.14 ΔH°r: -132468 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 22.26 20.14 17.71 15.52 13.34 11.55 9.94 8.30